VONA
What is VONA?

VONA stands for Volcano Observatory Notice for Aviation. It issues reports for changes, both increases and decreases, in volcanic activities, providing a description on the nature of the unrest or eruption, potential or current hazards as well as likely outcomes. See the following link (USGS) for further details. The Center for Volcanology and Geological Hazard Mitigation (CVGHM) under the Geological Agency of the Indonesian Ministry of Energy and Mineral Resources produced VONA's reports based on analysis of data from the agency's monitoring networks as well as from direct observations. VONA's alert levels are color-coded to indicate the different types of notifications addressing specific informative needs. The reports are disseminated via email to national and international stakeholders in the aviation sector. Other interested parties can avail of them through email subscription. All notifications are publicly available online.

USGS
 

4th of October 2022, 2 days ago

2022-10-04 12:01:00 UTC Orange

Ibu - 20221004/1201Z 

Axl Roeroe, Ibu Volcano Observatory - 2 days ago

Eruption with volcanic ash cloud at 1144 UTC (2044 local). Best estimate of ash-cloud top is around 7760 FT (2425 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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2022-10-04 10:49:00 UTC Orange

Ibu - 20221004/1049Z 

Axl Roeroe, Ibu Volcano Observatory - 2 days ago

Eruption with volcanic ash cloud at 1021 UTC (1921 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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29th of September 2022, 1 week ago

2022-09-29 00:31:00 UTC Orange

Ibu - 20220929/0031Z 

Axl Roeroe, Ibu Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 0009 UTC (0909 local). Best estimate of ash-cloud top is around 12240 FT (3825 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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27th of September 2022, 1 week ago

2022-09-27 12:22:00 UTC Orange

Ibu - 20220927/1222Z 

Axl Roeroe, Ibu Volcano Observatory - 1 week ago

Eruption with volcanic ash cloud at 1207 UTC (2107 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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15th of September 2022, 3 weeks ago

2022-09-15 10:17:00 UTC Orange

Ibu - 20220915/1017Z 

Axl Roeroe, Ibu Volcano Observatory - 3 weeks ago

Eruption with volcanic ash cloud at 1001 UTC (1901 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to northwest..

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11th of September 2022, 3 weeks ago

2022-09-11 12:07:00 UTC Orange

Ibu - 20220911/1207Z 

Axl Roeroe, Ibu Volcano Observatory - 3 weeks ago

Eruption with volcanic ash cloud at 1147 UTC (2047 local). Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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7th of September 2022, 4 weeks ago

2022-09-07 01:14:00 UTC Orange

Ibu - 20220907/0114Z 

Axl Roeroe, Ibu Volcano Observatory - 4 weeks ago

Eruption with volcanic ash cloud at 0053 UTC (0953 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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4th of September 2022, 1 month ago

2022-09-04 03:38:00 UTC Orange

Ibu - 20220904/0338Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0313 UTC (1213 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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25th of August 2022, 1 month ago

2022-08-25 04:32:00 UTC Orange

Ibu - 20220825/0432Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0405 UTC (1305 local) Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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23rd of August 2022, 1 month ago

2022-08-23 00:07:00 UTC Orange

Ibu - 20220823/0007Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2351 UTC (0851 local). Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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21st of August 2022, 1 month ago

2022-08-21 10:16:00 UTC Orange

Ibu - 20220821/1016Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0958 UTC (1858 local). Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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20th of August 2022, 1 month ago

2022-08-20 00:32:00 UTC Orange

Ibu - 20220820/0032Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0012 UTC (0912 local). Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west..

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16th of August 2022, 1 month ago

2022-08-16 06:20:00 UTC Orange

Ibu - 20220816/0620Z 

Axl Roeroe, Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 0554 UTC (1454 local). Best estimate of ash-cloud top is around 9040 FT (2825 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to south..

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11th of August 2022, 1 month ago

2022-08-11 23:07:00 UTC Orange

Ibu - 20220811/2307Z 

Ridwan Djalil, Ibu Volcano Observatory - 1 month ago

Gambaran umum aktivitas gunungapi. Contoh : Eruption with volcanic ash cloud at 2144 UTC (0644 local). Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to north.

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2022-08-11 22:32:00 UTC Orange

Ibu - 20220811/2232Z 

Pretina Sitinjak, S.T., Ibu Volcano Observatory - 1 month ago

Eruption with volcanic ash cloud at 2144 UTC ( 0644 local) Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-,cloud moving to North.

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VONA Color Code

Volcano is in normal, non-eruptive state, or, after a change from a higher level: Volcanic activity considered to have ceased, and volcano reverted to its normal, non-eruptive state.


Volcano is experiencing signs of elevated unrest above known background levels, or, after a change from higher level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.


Volcano is exhibiting heightened unrest with increased likelihood of eruption with column height below 6000 meter above sea level.


Eruption is forecast to be imminent with significant emission of ash with column height above 6000 meter above sea level.